A hydro-electric power station has a reservoir of area 2-4 square kilometres and capacity 5 × 106 m³. The effective head of water is 100 m. The penstock, turbine and generator efficiencies are 95%, 90% and 85% respectively. (i) Calculate the total energy in kWh which can be generated from the power station.
Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
We have a hydro-electric power station having,
Reservoir area = 2.4 Square killometer
Volume or capacity of reservoir = 5 * 106 m3
effective head = 100 m
penstock efficiency = 95% = 0.95
turbine efficiency = 90% = 0.9
Generator efficiency = 85% = 0.85
WE need to calculate the total energy in KWh which can be generated from this power station.
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